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Durability of Materials in a Stress-Response Framework: Acrylic Materials for Photovoltaic Systems

Published online by Cambridge University Press:  12 July 2012

Myles P. Murray
Affiliation:
Solar Durability Lifetime Extension Center, Case Western Reserve University, Cleveland, Ohio 44106 U.S.A.
Laura S. Bruckman
Affiliation:
Solar Durability Lifetime Extension Center, Case Western Reserve University, Cleveland, Ohio 44106 U.S.A.
Roger H. French
Affiliation:
Solar Durability Lifetime Extension Center, Case Western Reserve University, Cleveland, Ohio 44106 U.S.A.
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Abstract

In the development of novel materials for enhanced photovoltaic (PV) performance, it is critical to have quantitative knowledge of the initial performance, as well as the performance of these materials over the required 25-year lifetime of the PV system. Lifetime and degradation science (L&DS) allows for the development of new metrology and metrics, coupled to degradation mechanisms and rates. Induced absorbance to dose (IAD), a new metric being developed for solar radiation durability studies of solar and environmentally exposed photovoltaic materials, is defined as the rate of photodarkening or photobleaching of a material as a function of total absorbed solar radiation dose. In a reliability engineering framework, these quantitative degradation rates can be determined at various solar irradiances making possible real time and accelerated testing. The potential to predict power losses in a photovoltaic system over time caused by the accumulation of this kind of degradation can be calculated for real time applications or extrapolated for accelerated exposure conditions. Three formulations of poly (methyl methacrylate) (PMMA) used for mirror augmented PV systems were analyzed for the changes in IAD after accelerated testing.

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Articles
Copyright
Copyright © Materials Research Society 2012

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References

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Durability of Materials in a Stress-Response Framework: Acrylic Materials for Photovoltaic Systems
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